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Biogeochemical Cycles in Ecosystems Diagram
Directions:
• Create a diagram of an ecosystem that shows the water cycle, the carbon cycle and the
nitrogen cycle.
• Your diagram must demonstrate that all three of these cycles are interconnected. (HINT: a
tree is involved in all three cycles at different steps; show this on your diagram).
• Draw pictures of different components of your ecosystem that allow you to show the
movement of each chemical through your diagram.
• Use blue arrows for the water cycle, black arrows for the carbon cycle, and green arrows for
the nitrogen cycle.
• Sketch a rough draft of your ideas, and then create a final product that is colorful and easy
for you to understand and study from!
• Your diagram must include all of these things:
o Precipitation
o Evaporation
o Transpiration
o Runoff
o Lake or ocean water
o Groundwater
o Water vapor
o Atmosphereic CO2
o Burning
o Combustion (fossil fuels)
o Fossil Fuels
o Photosynthesis
o Respiration
o Decomposition
o Food Chain
o Atmospheric nitrogen
o Nitrogen fixation by bacteria
o Nitrification by bacteria
o Ammonia
o Nitrates
o Waste
o Dentrification
o Create a key with Water,
Carbon and Nitrogen cycles
Additional expectations:
• Make sure all three cycles goes into the food chain somehow.
• Have at least one organism that has all three cycles going through it to show
interconnectedness.
• Always show how the chemical moves through the food chain into different trophic levels.
